What does Atlas Copco GA 37/45 VSD converter alarm 0x2312 mean?
Short answer: Drive detected overcurrent at the motor. If your Atlas Copco GA 37 VSD / GA 45 VSD (Elektronikon Graphic controller) is showing Converter alarm 0x2312 — Motor overcurrent, the controller has logged a specific, documented condition. This page covers what it means, what causes it, what you can safely fix yourself, and when — and why — it takes a technician.
What exactly is the machine telling you?
The converter measured excessive current on the motor side. Documented checks include loose connectors at the converter control unit and Elektronikon display, and tripped fuses at transformer T1 in the electrical panel.
Which machines show this?
Atlas Copco GA 37 VSD and GA 45 VSD variable-speed compressors with the Elektronikon Graphic controller. Because the motor is fed through a frequency converter, these machines add a second layer of fault reporting: alongside normal compressor messages, the drive raises converter alarms in hexadecimal — 0x1111, 0x2312, 0x2314 and similar — which the Elektronikon relays to the display. The instruction book documents remedies for only a handful of these and says to contact Atlas Copco for the rest. Practical tip: log the exact hex code and what was happening on the plant's power supply at that moment; most of these alarms trace back to supply-voltage quality rather than the compressor.
What causes it?
- Loose connectors at the converter control unit or Elektronikon display (documented check)
- Tripped fuses at transformer T1 in the electrical panel
- A real mechanical overload — blocked cooling air or a discharge setpoint too high
- A one-off transient cleared by a clean power cycle
Can you fix it yourself?
One clean power cycle and an outside look for obvious load problems is the in-house limit; a repeating code is a service call.
Step by step — what to try, in order:
- Power the unit down cleanly and restart once to rule out a transient
- Check for obvious mechanical load issues you can see from outside: blocked cooling air, very high discharge pressure setpoint
- Record how often and under what load the code appears
When do you need a technician — and why?
The documented remedies — connector and fuse inspection — are inside the high-voltage converter cabinet, and the manual says to contact Atlas Copco if other codes appear.
If it does come to a service call and you're in Nashville, TN or Birmingham, AL, we maintain independently compiled lists of local companies that service industrial air compressors — real businesses with verified contact information, none of whom paid to be listed.
Related questions
What does Converter alarm 0x2312 — Motor overcurrent mean on an Atlas Copco GA 37 VSD / GA 45 VSD (Elektronikon Graphic controller)?
Drive detected overcurrent at the motor. The converter measured excessive current on the motor side. Documented checks include loose connectors at the converter control unit and Elektronikon display, and tripped fuses at transformer T1 in the electrical panel.
Can I fix Converter alarm 0x2312 — Motor overcurrent on an Atlas Copco GA 37 VSD / GA 45 VSD (Elektronikon Graphic controller) myself?
One clean power cycle and an outside look for obvious load problems is the in-house limit; a repeating code is a service call.
When does Converter alarm 0x2312 — Motor overcurrent on an Atlas Copco GA 37 VSD / GA 45 VSD (Elektronikon Graphic controller) need a technician?
The documented remedies — connector and fuse inspection — are inside the high-voltage converter cabinet, and the manual says to contact Atlas Copco if other codes appear. Connector and fuse inspection inside the converter cabinet is electrician/Atlas Copco territory; the manual says to contact Atlas Copco if other codes appear.
Verified against service documentation: Atlas Copco GA 37 VSD / GA 45 VSD (Elektronikon Graphic controller) documentation for Converter alarm 0x2312 — Motor overcurrent (manualslib.com)